soc: qcom: msm_performance: Remove deprecated Hotplug management

Remove hot plug management from msm_performance since modules
it depends on(msm_core.c) for statistics is no longer used.

Change-Id: I6385c26396f16b65ceff2eb0feb5bfefa0d01019
Signed-off-by: Vijay Ganti <viganti@codeaurora.org>